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<p>AbstractSolar-driven biomass gasification is a promising approach for producing renewable fuels such as green hydrogen. Catalysts are a potential pathway for enhancing the performance of gasification technologies; however, traditional catalytic methods still focus on improving the performance of autothermal gasification. To support the expansion of catalytic technology to solar gasification, this study was aimed at investigating the characteristics and mechanisms of traditional catalysts under solar irradiation in the absence of oxygen. Four types of catalysts were experimentally studied for their comprehensive thermochemical properties in solar-driven straw biomass gasification using a newly developed direct-irradiation fixed-bed reactor. The prototype design achieved a maximum bed temperature of 1260°C with an average solar irradiance flux density of 1171.3 kW/m<sup>2</sup>. Compared to non-catalytic processes, the use of catalysts has led to varying degrees of improvement in syngas yield. The H<sub>2</sub> yield of the syngas catalyzed by CaO reached 49.50%, which was 3.44% higher than that of the non-catalytic syngas. Compared with non-catalytic conditions, CaMg(CO<sub>3</sub>)<sub>2</sub>, Fe<sub>2</sub>O<sub>3</sub>, Na<sub>2</sub>CO<sub>3</sub>, and CaO significantly enhanced the energy upgrade factor of gasification. The energy upgrade factor of gasification catalyzed by CaMg(CO<sub>3</sub>)<sub>2</sub> notably increased to 1.08, with a molar H<sub>2</sub>/CO ratio of 0.87. Additionally, microanalysis of solid residues revealed partial transformation and morphological damage of the catalysts under solar irradiation. Integrated catalytic experiments on solar gasification provide new avenues and rich foundational data for intensification and regulation of gasification products.</p>

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Experimental study on solar-driven biomass catalytic gasification characteristics in the direct radiative reactor

  • 期刊论文

  • 发表日期：

    2025年5月28日

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  • Zhang Bai,
  • Shuoshuo Wang,
  • Qibin Liu,
  • Xiankun Huang,
  • Xiaoli Zhu,
  • Fan Jiao,
  • Liang Gong

摘要

AbstractSolar-driven biomass gasification is a promising approach for producing renewable fuels such as green hydrogen. Catalysts are a potential pathway for enhancing the performance of gasification technologies; however, traditional catalytic methods still focus on improving the performance of autothermal gasification. To support the expansion of catalytic technology to solar gasification, this study was aimed at investigating the characteristics and mechanisms of traditional catalysts under solar irradiation in the absence of oxygen. Four types of catalysts were experimentally studied for their comprehensive thermochemical properties in solar-driven straw biomass gasification using a newly developed direct-irradiation fixed-bed reactor. The prototype design achieved a maximum bed temperature of 1260°C with an average solar irradiance flux density of 1171.3 kW/m2. Compared to non-catalytic processes, the use of catalysts has led to varying degrees of improvement in syngas yield. The H2 yield of the syngas catalyzed by CaO reached 49.50%, which was 3.44% higher than that of the non-catalytic syngas. Compared with non-catalytic conditions, CaMg(CO3)2, Fe2O3, Na2CO3, and CaO significantly enhanced the energy upgrade factor of gasification. The energy upgrade factor of gasification catalyzed by CaMg(CO3)2 notably increased to 1.08, with a molar H2/CO ratio of 0.87. Additionally, microanalysis of solid residues revealed partial transformation and morphological damage of the catalysts under solar irradiation. Integrated catalytic experiments on solar gasification provide new avenues and rich foundational data for intensification and regulation of gasification products.